Cecilius Calvert, 2nd Baron Baltimore (circa 1605 - 1675), inherited on the death of his father George in 1632 the grant by Charles I of England of the new colony of Maryland. Cecilius thus became Maryland's first proprietor (1632 - 1675). He governed through deputies, the last being his only son Charles.

{| border="2" align="center" |- |width="30%" align="center"|Preceded by:
George Calvert |width="40%" align="center"|Baron Baltimore |width="30%" align="center"|Followed by:
Charles Calvert |}